RESEARCH / A0515
Structural design and electronic regulation of atomically dispersed MoS4 sites by second shell N species reconfiguration for intensifying hydrogen spillover
Read the original paper · 10.1016/j.cej.2024.156679 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig. 1. Schematic illustration and the structure of the Mo-S4-N/C catalyst. (a) Synthesis illustration, (b) SEM, (c) TEM, (d) AC-HAADF-STEM, (e) HAADF-STEM-EDS mapping of the Mo-S4-N/C catalysts. Local structure configuration of Mo-S4-N/C catalyst of (f) Mo K-edge XANES spectra, (g) FT-EXAFS spectra in R space, (h) Mo WT-EXAFS plot. (i) The average valance states with Mo-S4-N/C by XANES fitting. (j) k2-weighted EXAFS fitting. (k) The configuration of the Mo-S4-N/C catalyst.
Fig. 3. The catalytic mechanism. The Mo-S4-N/C catalysts before and after the reaction of (a) XPS spectra of N 1 s, (b) NEXAFS at the N K-edge, (c) H2-TPR. (d) In situ DRIFTS spectra from 50 °C to 450 °C, the inset shows the conversion of N species type. (e) TG-MS.